Improvement in rotary engines



'1. 6. Wm. Rotary-Engines.

Patented la n- 20. 1874.1

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AMP/107v iii/IMMPIl/(i to. M Wesson/E's moms;

UNITED STATES PATENT QFFIGE.

JOHN G. VVITT, OF ELMIRA, NEW YORIQ ASSIGNOR OF ONE-IIALF HIS RIGHT TOCHARLES F. ROE, OF SAME PLACE.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent No. 146,627, datedJanuaiyQO, 1-874; application died March 13, 1873.

To all whom it may concern:

Be it known that I, JOHN G. \VITT, of Elmira, in the county of Ohemun g,in the State of New York, have invented a new and useful Improvement ona Rotary Engine; and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawing making a part of thisspecification, in which-- Figure 1 is a side view with the front headoff. Fig. 2 is a side view of front head and packing-case. Fig. 3 is anend view of front head and packing-case.

Letter m represents the driving-cam; n, the helping caima and l),steam-joints; 9,, space between cogs, as shown in Fig. 1. Letter 0represents a side passage or run-round for steam; e, the packing-case,as shown in Figs. 2 and 3. A pipe may be attached to the heads, so as tocarry the steam around the joint a, as another form of passage. Lettercl represents the supply-pipe, as shown in Fig. 3.

The arrow shows the directionthe cams run.

I find, in the rotation of the gears, as the point of the cogs on thehelping-cam draws out from the root of the cogs on the driving-cam, moresurface exposed to a backward pressure, that causes a weak point, which,in my invention, I overcome.

In my invention, I carry the steam down the pose set forth.

JOHN G. W113i. Witnesses: JOSEPH M. Ron,

R. H. RANSOM.

